Leaking Shower - what size of O ring?

[ANT5]

Hi

the shower thermostatic mixer valve is leaking on my Mira shower. What size of o ring is needed as a replacement

The mixer tsp is not flush type and it looks like the pipe connection on the right side is leaking.

 

[Madrab]

Pic would help - is it the 3/4" connection nut onto a fitting kit? If so they a 3/4" rubber seal would be needed.

 

[ANT5]

Here are a couple of photos, one you can see where it is dripping.

Is this 3/4?

 

[Rodders53]

That looks like a Mira Coda EV according to Mr Google, or something very similar.

https://www.showerspares.com/mira_shower_spares/mira_all/mira_coda_plus_ev_2.1712.003/ has exploded diagrams and a full manual for it that may help you identify if it's the 3/4 flat washer or another item in the bar that has o-ring seals?

I can't identify exactly where it is leaking from the photos... Perhaps all it needs is a nip up of the fixing nut to seal better? RHS will be cold feed. The sealing washers on those inlets may have mesh filters built in?

 

[ANT5]

Looks like it’s the cold connection pipe work where it meets the mixer valve

 

[Madrab]

As suggested check that the coupler is tight first, sometime they just need a nip up. If not then you'll need to pull the bar mixer off and check the feed to valve feed rubber seal first. If that's ok then it's on to the internal O-Ring, which may a bit more difficult to get to. Some use large allan keys to get the coupler out of the bar. Would be more unusual to be the internal o-ring, though never say never.

 

[HERTS P&D]

While its off, just fit a new shower bar while you are there, £55 from screwfix.

https://www.screwfix.com/p/swirl-exposed-shower-mixer-fixed-chrome/954kf

(Check for fitment first.)

Andy